Truck



0a. 29, 1946. H. c. KEYSOR TRUCK Filed May 1 5, 1944 2 sheets-sheet 1 INVEN TOR.

2 Sheets- Sheet 2 H. C. KEYSOR TRUCK Filed May 15,1944

(Jet. 29, 1946.

INVENTOR. [266%50 Patented Oct. 29, 1946 OFFICE TRUCK Harold C. Keysor,Chicago, Ill., assignor to American Steel Foundries, Chicago, 111., acorporation of New Jersey Application May 15, 1944, Serial No. 535,616

29 Claims. I

My invention relates to railway car trucks and more particularly to aride control truck wherein friction means is provided for dampeningvertical oscillations of the bolster.

The general object of my invention is to devise friction means fordampening relatively small bolster oscillations and other friction meansfor dampening relatively great bolster oscillations.

More specifically, I provide a leaf spring assembly to which the truckbolster is connected, said assembly being capable of dampeningrelatively small oscillations of the bolster, and I also providefriction means operatively connected to said assembly for actuationthereby in the event of relatively great bolster oscillations.

My invention comprehends a bolster and friction shoes of novel formcomprising abutment means for engagement with the leaf spring assemblyand particularly adapted to permit the flexure thereof necessary toaccomplish the above-mentioned objects.

Another object of my invention is to design a truck such as abovedescribed, wherein the various elements thereof are so formed andarranged as to accommodate a quick wheel change wherein the bolster iselevated in the bolster opening and removed therefrom while the bolstersupporting springs and associated friction means remain in normalassembled relationship with the side frame.

In the drawings,

Figure 1 is a fragmentary side elevation of a railway car truckembodying my invention, only one end thereof being illustrated inasmuchas the truck is symmetrical about its transverse center line.

Figure 2 is a fragmentary sectional view taken in the transversevertical plane indicated by the line 22 of Figure 1.

Figure 3 is a fragmentary top plan view of the structure shown inFigures 1 and 2 with portions of the side frame and associated frictiondevices broken away to more clearly illustrate the connection betweenthe bolster and the friction devices.

Figure 4 is a sectional view taken in the trans- Verse vertical planeindicated by the line 4-4 of Figure 1..

Figure 5 ,is an elevational View of one of my novel friction shoes,taken from the leaf spring engaging face thereof.

Describing my invention in detail, the side frame comprises the tensionand compression members 2 and 4 and. spaced columns E, 6 definingtherewith a central bolster opening 8 with a widened upper portion IDfor a purpose hereinafter described in detail; and each column 6 defineswith the tension and compression members a Window opening I2 adjacentone end of the frame.

a the bolster and receiving therewithin a spring seat block 25 which isseated as at.28 (Figure 2) on the springs 20, 2D. The bolster recess 2dis provided with a relatively narrow upper portion for the reception ofa leaf spring assembly comprising a plurality of leaf springs 32, 32,each end of said assembly extending through an opening 34 in theadjacent column and into the adjacent window opening I2 for actuation ofa friction device mounted therein.

Each friction device comprises spaced inboard and outboard frictionpanels-i6, 36 positioned at their upper ends within recesses 33, 38formed in the inboard and outboard walls 40, 4B of the compressionmember 4, as best seen in the sectional view of Figure 4, and the lowerends of the panels 35, 36 are received within recesses 42, 42 in thetension member 2. Spaced identical friction shoes 44, 44 arefrictionally engaged with the respective panels 35, 36 as at 46, 46, anda spring 48 is compressed between said shoes.

Figure 5 illustrates in detail the configuration of one of my novelfriction shoes 44, M, and it will be noted that the rear face of saidshoe is provided with a spring seat 50 for the abovementioned spring 48,said seat being defined between the top and bottom ledges 52 and 54formed on their adjacent edges with arcuate spring positioning surfaces56, 56. Above the spring seat 58, the rear face of the shoe is providedwith a transverse slot 58 for the reception of the leaf springs 32, 32,the top and-bottom margins of said slot being arcuately formed as at(iii, 63 to accommodate flexing of said springsfor a purpose hereinafterdescribed. It may be noted that the shoes are provided with a pair oftop assembly lugs 62, 62 and a pair of bottom assembly lugs 64, 64,whereby each pair of shoes may be interlocked by assembly links (notshown) looped over the lugs. 62, E2 and 64, 64 for the purpose ofmaintaining the shoes and the spring 38 in a unit which may beconveniently assembled and disassembled in a manner hereinafterdescribed in particular.

It may be noted that each friction panel is provided with spacedsubstantialiy vertical flanges es and 63 at opposite sides thereof, theflanges G6, 662 on respective panel being spaced a sufiicient distancefrom each other to accommodate the leaf springs 32, 32. The flanges es,68,

however, are of greater width than the flanges 86, 66 for the purpose ofmaintaining the springs:

clearly seen in Figure i that the lugs it, T0 are of less depth than thewidened upper portion If) of the bolster opening to accommodate theelevation of the bolster therein for convenient removal' from the topthereof, during a quick wheel change, while the springs 29, 2i and theother truck elements remain in normal assembledrelationship with theside frame.

It may be noted that the surface of the bolster defining the top of therecess 24 is arcuately formed as at E2 (Figure I) and, likewise, the topof the block 26 is arcuately formed as at i i in order to accommodatefleXure of the leaf springs 32, 32 as the bolster oscillates on itssupporting springs 20, 25!. It will be understood that by means of thearrangement above described, relatively small oscillations of thebolster will be permitted by theflexure of the leaf springs 32, 32,which thus develop friction therebetween to afford control of suchoscillations without actuating the friction shoes M, 44. On the otherhand, relatively great oscillations of the bolster will cause thesprings 32, 32 to move the friction shoes 54, 44 vertically against thefriction panels 36, 36, thus developing a relatively great amount offriction, which is desirable under such conditions.

In assembling my novel truck, the springs 32, are first inserted intothe column openings 34, as, the springs being turned edgewise toaccommcdate'this insertion, and thereafter the springs 32, 32 areelevated to the upper extremities of said column openings 34, 34 and aremoved longitudinally of the frame until they are completely withdrawnfrom one window l2. Thereafter, the associated friction device isassembled within said window l2 with the slots 58, 58 in the frictionshoes disposed above the upper level of the flanges 6% and 68 on thefriction panels 36, 36. The leaf springs 32, 32 are then inserted intothe slots 58, 58 and are moved therethrough into the window I 2 untiltheiropposite ends are withdrawn from the other window. Thereafter, theother friction device is assembled within the other window with thefriction shoe slots 58, 58 disposed above the upper level of thefriction panel flanges to and 68, thus permitting the leaf springs 32,32 to be inserted into the friction shoe slots. The springs 20, and theblock 24 are then assembled in the bolster opening 8 and the leafsprings 32,, 32 are moved downwardly along with the friction shoes 44, Muntil the lower leaf spring 32 engages the block 25. The bolster is theninserted at the topof the bolster opening and lowered onto the leafspring assembly and the springs 28, 28.

It is to be understood. that I do not wish to be limited by the exactembodiment of the device shown which is merely by way of illustrationand not limitation as various and other forms of the device will, ofcourse, be apparent to those skilled in the art without departing fromthe spirit of the invention or the scope of the claims.

I claim:

1. In a railway car truck, a side frame comprising spaced columnsdefining spaced windows and an intermediate bolster opening, saidcolumns having openings theretnrough aligned longitudinally of saidframe, a friction device in each window comprising inboard and outboardfriction surfaces on said frame, spaced friction shoes, engagingrespective surfaces, and resilient means urging said. shoes into saidengagement, a spring group on said frame in said bolster opening, aspring seat block supported on said group and comprising an arcuate topsurface, abolster supported on said group and comprising a downwardlyfacing arcuate surface spaced above said first-mentioned surface, saidbolster comprising interlocking means engaging said columns toafford aninterlock therewith, and a leaf spring assembly supported on said blockin engagement with said arcuate surfaces, each extremity of saidassembly extending through the adjacent column opening and having anoperative connection with the associated friction shoes, said operativeconnection comprising slots in the adjacent faces of said last-mentionedshoes, said slots having arcuate top and bottom surfaces bearing againstsaid assembly.

2. In a railway car truck, a side frame comprising spaced columnsdefining spaced windows and an intermediate bolster opening having awidened upper portion, said columns having openings therethrough alignedlongitudinally of said frame, a friction device mounted on said frame ineach window, a spring group seated on said frame in said bolsteropening, a block supported on said group and comprising an arcuate topsurface, a bolster supported on said group and comprising a downwardlyfacing arcuate surface spaced above said first-mentioned surface, saidbolster comprising integral interlocking means engaging said columns toafford an interlock between said bolster and said frame, and a leafspring assembly supported on said block in abutment with said arcuatesurfaces, each extromity of said assembly extending through the adjacentcolumn opening and having an operative connection with the associatedfriction device, said interlocking' means being of less depth than thewidened upper portion of said bolster opening, whereby said bolster maybe elevated therein and removed therefrom during a quick wheel change.

3. In a railway car truck,. a side frame comprising spaced columnsdeflning' spaced windows and an intermediate bolster opening. saidcolumns having openings therethrough alignedlom gitudinally of saidframe, a friction device ineach window comprising inboard and outboardfriction surfaces on said frame, spaced friction shoes engagingrespective surfaces, and resilient means urging said shoes into saidengagement, a spring group on said frame in said bolster opening, aspring seat block supported on said group. and comprising an arcuate topsurface, a bolster supported on said group and comprising a downwardlyfacing arcuate surface spaced above said firstem'entioned surface, said.bolster comprising interlocking means engaging, said columns. to afford,an interlock therewith.v and a leaf spring assembly supported on saidblock in engagement with said arcuate surface, each extremity of saidassembly extending through the adjacent column opening and having anoperative connection with the associated friction shoes, said blockbeing recessed in said bolster and comprising a bottom surfacesubstantially coplanar with the bottom thereof.

4, In a railway car truck, a side frame comprising spaced columnsdefining spaced windows and an intermediate bolster opening, a frictiondevice in each window comprising inboard and outboard friction panelsmounted on said frame, spaced friction shoes engaging respective panels,and resilient means under compression between said shoes for urging thesame into said engagement, a spring group on said frame in said bolsteropening, a block supported on said group and comprising an arcuate topsurface, a bolster supported on said group and comprising a downwardlyfacing arcuate surface'spaced above said first-mentioned surface, a leafspring assemb y supported on said block in engagement with said arcuatesurfaces, each end of said assembly extending through the adjacentcolumn and being slidably interlocked with the associated friction shoesfor actuation thereof, and a flange on at least one panel of each devicefor abutment with the adjacent extremity of said assembly to limitmovement thereof longitudinally of the frame.

5. In a railway car truck, a side frame comprising spaced columnsdefining spaced windows and an intermediate bolster opening, saidcolumns having openings therethrough aligned longitudinally of saidframe, a friction device in each window comprising inboard and outboardfriction surfaces on said frame, spaced friction shoes engagingrespective surfaces, and resilient means urging said shoes into saidengagement, a spring group on said frame in said bolster opening, aspring seat block supported on said group and comprising an arcuate topsurface, a bolster supported on said group and comprising a downwardlyfacing arcuate surfacespaced above said first-mentioned surface, saidbolster comprising interlocking means engaging said columns to afford aninterlock therewith, and a leaf spring assembly supported on said blockin engagement with said arcuate surfaces, each extremity of saidassembly extending through the adjacent column opening and having anoperative connection with the associated friction shoes.

6. In a railway car truck, a side frame comprisl g spaced columnsdefining spaced windows and an intermediate bolster Opening, a frictiondevice in each window comprising inboard and outboard friction panelsmounted on said frame, spaced friction shoes engaging respective panels,and resilient means under compression between said shoes for urging thesame into said engagement,

. a spring group on said frame in said bolster opening, a blocksupported on said group and comprising an arcuate top surface, a bolstersupported on said group and comprising a downwardly facing arcuatesurface spaced above said first-mentioned surface, and a leaf springassembly supported on said block in engagement with said arcuatesurfaces, each end of said assembly extending through the adjacentcolumn and being slidably interlocked with the associated friction shoesfor actuation thereof.

7. In a railway car truck, a side frame comprising spaced columns partlydefining spaced windows and an intermediate bolster opening, frictiondevices carried by said frame in respective windows, resilient means onsaid frame in said opening, a bolster and spring seat block supportedfrom said resilient means and comprising respectively spaced opposedarcuate surfaces, and a plurality of spring plates extending betweensaid bolster and said block, the top plate bearing against said bolstersurface and the bottom plate bearing against said block surface, saidplates extending through openings in respective columns and havingoperative connections with said friction devices, each of said devicescomprising inboard and outboard friction panels on said frame, frictionshoes frictionally engaging respective panels and interlocked with saidspring lates, and resilient means under compression between said shoes.

8. In a railway car truck, a side frame comprising spaced columnsdefining spaced windows and an intermediate bolster opening, saidcolumns having openings therethrough aligned longitudinally of saidframe, a friction device in each window, a spring group on said frame insaid bolster opening, a block supported on said group and comprising anarcuate top surface, a bolster supported on said group and comprising adownwardly facing arcuate surface spaced above said first-mentionedsurface, said bolster comprising integral interlocking means engagingsaid columns, and a leaf spring assembly supported on said block inengagement with said arcua'te surfaces, each extremity of said assemblyextending through the adjacent column opening and having an operativeconnection with the associated friction device.

9. In a railway car truck, a side frame comprising spaced columns partlydefining spaced windows and an intermediate bolster opening, resilientmeans on said frame in said opening, a bolster supported from saidresilient means, friction devices on said frame in respective windows,and a leaf spring assembly interposed between said bolster and saidresilient means, each extremity of said assembly extending through theadjacent column and having an operative connection with the devicetherein, each of said devices comprising inboard and outboard frictionsurfaces on said frame, friction shoes resiliently urged againstrespective surfaces, and means on said shoes slidably interlocked withsaid assembly.

10. In a railway car truck, a side frame comprising spaced columnspartly defining spaced windows and an intermediate bolster opening,spaced friction devices supported by said frame in respective windows,resilient means on said frame in said opening, a bolster and spring seatlock supported from said resilient means and comprising respectivelyspaced opposed arcuate surfaces, and a plurality of spring platesextend: ing between said bolster and said block, the top plate bearingagainst said bolster surface and the bottom plate bearing against saidblock surface, said plates extending through openings in respectivecolumns and having operative connections with said friction devices.

11. In a railway car truck, a side frame comprising spaced columnspartly defining spaced windows and an intermediate bolster opening,resilient means on said frame in said opendng, a bolster supported fromsaid resilient means, friction devices on said frame in respectivewindows, and a leaf spring assembly interposed between said bolster andsaid resilient means, each extremity of said assembly extending throughthe adjacent column and having an operative connection with the devicetherein, said bolster havi-ng a downwardly facing arcuate surfacebearing on said assembly.

12. In a railway car truck, a side frame comprising spaced columnspartly defining spaced windows and an intermediate bolster opening,resilient means on said frame in said opening, a bolster supported fromsaid resilient means, friction devices on said frame in respectivewindows, and a leaf spring assembly interposed between said bolster andsaid resilient means, each extremity of said assembly extending throughthe adjacent column and having an operative connection with the devicetherein.

13. In a railway car truck, a side frame. a fric tion device mountedthereon, a bolster resiliently supported from said frame, and anoperative con nection between said bolster and said device COl'l1-prising a leaf spring assembly associated therewith, said devicecomprising spaced friction panels on said frame, friction elementsresiliently urged into engagement with respective panels, and means onsaid elements interlocked with said assembly.

14. In a railway car truck, a side frame comprising spaced columnspartly defining a bolster opening and spaced windows at opposite sidesthereof, friction devices on said frame in respective windows, a bolsterresiliently supported from said frame in said opening, and a leaf springassembly extending longitudinally of the frame through said columns andoperatively connected to respective devices, said assembly beingoperatively connected intermediate its ends to said bolster.

15. In a railway car truck, a side frame comprising spaced columnspartly defining spaced windows and an intermediate bolster opening,friction devices mounted on said frame in said windows, a bolsterresiliently supported from said frame in said opening, and flexiblemeans carried by said bolster for vertical movement therewith, saidflexible means being operatively connected to said devices.

15. In a railway car truck, a side frame comprising top and bottommembers and spaced col-- umns defining therewith a bolster opening andspaced windows at opposite sides thereof, spring means on said frame insaid opening, a bolster supported by said spring means, friction meansmounted on said frame in respective windows, said. friction meanscomprising a pair of friction devi arranged and connected to each otherso as to operate in series, one of the said devices being of relativelygreat capacity as compared with the other. said small capacity deviceextending through an opening in the associated column and beingoperatively connected to the bolster, and serving to dampen smalloscillations of the bolster without actuating said large capacitydevice, said large capacity device being actuated by said small capacitydevice when large oscillations of the bolster occur'beyond the operatinglimit of said small capacity device.

1'7. In a railway car truck, a side frame comprising top and bottommembers and spaced columns defining therewith a bo ster open ng andspaced windows at opposite sides thereof, spring means on said frame insaid opening, a bolster supported by said spring means, friction meanscompris ng a pair of friction devices mounted on said frame inrespective windows, openings through said columns, and an operativeconnection between said bolster and said devices cmprising a frictiondevice extending through said column openings, said last-mentioneddevice be- 8 ing of less capacity than said first-mentioned devices. I

18. In a friction shoe, a member having a friction surface on the frontface thereof, and a spring seat on the rear face thereof and atransverse slot in the rear face of said member above said seat, saidslot presenting opposed top and bottom arcuate spring abutment surfaces.

19. In a railway car truck, a side frame comprising spaced columns andan intervening bolster opening, a bolster resiliently supported by saidframe in said opening, friction means comprising an opening in at leastone of said columns, a friction device mounted on said frame, and anoperative connection between said bolster and said device comprising aleaf spring assembly connected therebetween and extending through saidsecond-mentioned opening, said assembly including a plurality ofabutting leaf springs formed and arranged to dampen relatively smalloscillations of said bolster Without actuating said device.

20. In a railway car truck, a side frame member including spacedcolumns, a bolster member resiliently supported from said frame memberbetween said columns, a friction device carried by one of said members,and means operatively connecting the other member to said device foractuation thereof, said means comprising a leaf spring assemblyextending through an opening in the associated column and including aplurality of interengag'ed leaf springs adapted to frictionally resistoscillations of the bolster member under certain operating conditions,

21. In a railway car truck, a side frame member, a bolster memberresiliently supported therefrom, a friction, device carried by one ofsaid members, said device comprising spaced friction surfaces on itssupporting member, friction shoes engaging respective surfaces, andresilient means for urging said shoes against said surfaces, and meansoperatively connecting the other member to said shoes for actuationthereof. said last-mention'ed means comprising a leaf spring assembly.

22. In a railway car truck, a side frame comprising top and bottommembers and spaced columns defining therewith a bolster opening andspaced w ndows at opposite sides thereof, spring means on said frame insaid opening. a bolster supported by said spring means, friction meanscomprising a friction device mounted on said frame in one of sa dwindows. an opening through the adjacent column, and means operativelyconnecting said bolster to said device for actuation thereof, saidconnecting means extending through sa d column opening and includingmeans for developing fr ction independently of said device.

23. In a railway car truck, a side frame, a bolster spring-supportedtherefrom. a friction device carried by said frame, said dev cecomprising a friction surface, a fr ction shoe movable thereagainst, andresilient means urging said shoe against said surface, and meansoperatively connecting said bolster to said shoe for actuation thereof,said connecting means comprising a leaf spring assembly.

24. In a railway car truck, a side frame member, a bolster memberspring-supported therefrom, a friction device carried by one of saidmembers, said device comprising a friction surface, a friction shoemovable thereagainst, resilient means urging said shoe against saidsurface, and means operatively connecting the other member to said shoefor actuation thereof.

said connecting means comprising a leaf spring assembly.

25. In a railway car truck, a supporting member including a column, amember resiliently supported from said supporting member and slidablyinterlocked with said column, a friction device carried by saidsupporting member and adapted to dampen oscillations of said supportedmember, and means operatively connecting said supported member to saiddevice for actuation thereof, said means comprising a leaf springassembly extending through an opening in said column and including aplurality of abutting leaf springs adapted to dampen relatively smalloscil lations of said supported member without actuat ing said device.

26. In a railway car truck, a supporting member, a member resilientlysupported therefrom,

a friction device carried by said supporting member and adapted todampen oscillations of said supported member, and means operativelyconnecting said supported member to said device for actuation thereof,said means comprising means for dampening relatively small oscillationsof said supported member without actuation of said device, said devicecomprising a pair of friction panels, friction shoes movablethereagainst, and resilient means for urging said shoes intoengagementwith said panels.

27. In a railway car truck, spaced side frames, a bolster extendingbetween said frames and spring-supported therefrom, and friction meansassociated with each end of the bolster for dampening oscillationsthereof, said means comprising spaced friction devices carried by theassociated side frame adjacent opposite ends thereof, and a leaf springassembly extending longitudinally of said frame and connected betweensaid bolster and devices for actuation of the latter, said devices andsaid assembly being so formed and arranged that relatively small bolsteroscillations are dampened by said assembly without actuation of saiddevices.

28. In a railway car truck, spaced side frames, a bolster extendingbetween said frames and spring-supported therefrom, and friction meansassociated with each end of the bolster for dampening oscillationsthereof, said means comprising spaced friction devices carried by theassociated side frame adjacent opposite ends thereof, and a leaf springassembly extending longitudinally of said frame and connected betweensaid bolster and devices for actuation of the latter, said devices andsaid assembly being so formed and arranged that relatively small bolsteroscillations are dampened by said assembly without actuation of saiddevices, each of said. devices including a friction panel, a frictionshoe movable thereagainst, and resilient means for urging said shoe intoengagement with said panel.

29. In a friction shoe, a member having a friction surface on the frontface thereof and a spring seat on the rear face thereof, and atransverse slot in the rear face of said member vertically spaced withrespect to said seat, said slot presenting opposed top and bottomabutment surfaces for cooperation with associated actuating means.

C. KEYSOR.

